The GTX-330 Transponder is similar to the GTX-327, but it offers Mode S operation and TIS Traffic (where available). In order to display Traffic, a compatible MFD is required (for example, the GNS-430, GNS-430W, GNS-530, GNS-530W, MX-20, GMX-200, and 695 and 696 portable MFDs).

Please note that 22 TIS radar ground stations are being replaced by a new radar transmitters that will no longer support TIS. This is being done because ADS-B is ATC's next traffic mechanism.

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